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Shell Programming and Scripting

How to replace text in a file with text entered

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# 8  
Old 04-11-2009
Perfect! Thanks everyone!

Last question I promise. How can I read and extract the existing data so I can show it to the user before they change it?

So for example, how would I extract
localhost:25
from
smtpDestination:=localhost:25

Thanks for all your help everyone!

Alex
# 9  
Old 04-11-2009
Code:
sed -e "s/smtpDestination:=\(.*\)/\1/" alex.cfg

# 10  
Old 04-11-2009
It's not quite right I think - it's printing out the whole alex.cfg.

My script looks like this:

Quote:
#!/bin/bash

function outputMenu {
cat > /dev/stdout <<DELIM
==============================================================================
Change SMTP Destination
==============================================================================

Enter the IP Address and Port Number of your Mail Server
Example: 192.168.0.1:25

{ENTER} = No Change

DELIM


sed -e "s/smtpDestination:=\(.*\)/\1/" alex.cfg


read USERCHOICE

case $USERCHOICE in
"") exit 0;;
*) sed -e "s/smtpDestination:=.*/smtpDestination:=$USERCHOICE/" alex.cfg > alex2.cfg && mv alex2.cfg alex.cfg;;
esac
}
clear
outputMenu
Am I doing something wrong?

Thanks,
Alex
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